'Battlefield Heroes' celebrates birthday with new map, free items

Battlefield Heroes celebrates its third birthday with a brand new map and free items.

The Fortress Frenzy map sees players fight for control of a small island, where the only way on or off is via six bridges on either side of the isle.

The development team has also expanded the mission system, introducing new ways to earn Valour and Experience Points, and added Treasure Chests, which offer random rewards on killing enemies.

Starting today and lasting until July 1, players who log onto the game will receive two party packs, which include a Battlefield Heroes birthday shirt, a tricycle emote that lasts for three days and a Treasure Chest Key.

The party packs - one of which is Royal, the other National - can be downloaded by visiting the game's official website and clicking the 'Rewards' section under 'My Stuff'.

In the three years since its launch, Battlefield Heroes has attracted more than two million registered users - a number that has swelled to 12 million, according to a new trailer - and was targeted by LulzSec hackers.